Endless belt, image forming apparatus, and endless belt unit

Abstract

An endless belt includes a polyamide imide resin layer in which a content of at least one solvent selected from a solvent group A consisting of a urea solvent, an alkoxy group-containing amide solvent, and an ester group-containing amide solvent is from 0.005 parts by weight to 3 parts by weight with respect to 100 parts by weight of the polyamide imide resin layer.

What is claimed is: 
     
       1. An endless belt comprising:
 a polyamide imide resin layer in which a content of at least one solvent selected from a urea solvent, an alkoxy group-containing amide solvent, and an ester group-containing amide solvent is from 0.005 parts by weight to 3 parts by weight with respect to 100 parts by weight of an entirety of the polyamide imide resin layer. 
 
     
     
       2. The endless belt according to  claim 1 ,
 wherein the content of the at least one solvent is from 0.05 parts by weight to 2 parts by weight with respect to 100 parts by weight of an entirety of the polyamide imide resin layer. 
 
     
     
       3. The endless belt according to  claim 2 ,
 wherein a boiling point of the at least one solvent is from 100° C. to 350° C. 
 
     
     
       4. The endless belt according to  claim 2 ,
 wherein the at least one solvent is selected from tetramethyl urea, tetraethyl urea, 1,3-dimethyl-2-imidazolidinone, N,N′-dimethylpropylene urea, 3-methoxy-N,N-dimethylpropanamide, and 3-n-butoxy-N,N-dimethylpropanamide. 
 
     
     
       5. The endless belt according to  claim 4 ,
 wherein the at least one solvent is 1,3-dimethyl-2-imidazolidinone. 
 
     
     
       6. The endless belt according to  claim 2 ,
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       7. The endless belt according to  claim 1 ,
 wherein the content of the at least one solvent is from 0.1 parts by weight to 1 part by weight with respect to 100 parts by weight of an entirety of the polyamide imide resin layer. 
 
     
     
       8. The endless belt according to  claim 7 ,
 wherein a boiling point of the at least one solvent is from 100° C. to 350° C. 
 
     
     
       9. The endless belt according to  claim 7 ,
 wherein the at least one solvent is selected from tetramethyl urea, tetraethyl urea, 1,3-dimethyl-2-imidazolidinone, N,N′-dimethylpropylene urea, 3-methoxy-N,N-dimethylpropanamide, and 3-n-butoxy-N,N-dimethylpropanamide. 
 
     
     
       10. The endless belt according to  claim 9 ,
 wherein the at least one solvent is 1,3-dimethyl-2-imidazolidinone. 
 
     
     
       11. The endless belt according to  claim 7 ,
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       12. The endless belt according to  claim 1 ,
 wherein a boiling point of the at least one solvent is from 100° C. to 350° C. 
 
     
     
       13. The endless belt according to  claim 12 ,
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       14. The endless belt according to  claim 1 ,
 wherein the at least one solvent is selected from tetramethyl urea, tetraethyl urea, 1,3-dimethyl-2-imidazolidinone, N,N′-dimethylpropylene urea, 3-methoxy-N,N-dimethylpropanamide, and 3-n-butoxy-N,N-dimethylpropanamide. 
 
     
     
       15. The endless belt according to  claim 14 ,
 wherein the at least one solvent is 1,3-dimethyl-2-imidazolidinone. 
 
     
     
       16. The endless belt according to  claim 15 
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       17. The endless belt according to  claim 14 ,
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       18. The endless belt according to  claim 1 ,
 wherein the polyamide imide resin layer further comprises conductive particles. 
 
     
     
       19. An image forming apparatus comprising:
 the endless belt according to  claim 1 . 
 
     
     
       20. An endless belt unit comprising:
 the endless belt according to  claim 1 ; and 
 a plurality of rolls which the endless belt is stretched over in a state where tension is applied.